GNOME raw photo thumbnailer (cr2, nef, etc)

raw-thumbnailer.sh

#!/bin/bash
# Save this script to /bin in order to generate RAW photo thumbnails in Ubuntu
# Save raw.thumbnailer to /usr/share/thumbnailers
# Note: you cannot put the script to e.g. /home, as thumnailers are now run in a sandbox provided by bwrap
# Requires exiftool and imagemagick (note: use real binary name of convert instead of /etc/alternatives, because it's not accessible from bwrap)

INPUT=$1
OUTPUT=$2
SIZE=$3
# use -PreviewImage to get a slower, but high quality thumbnail
exiftool -ThumbnailImage -b $INPUT | convert-im6.q16hdri -resize "${SIZE}x${SIZE}>" jpg:- $OUTPUT

raw.thumnailer

[Thumbnailer Entry]
Exec=/bin/bash /bin/raw-thumbnailer.sh %i %o %s
MimeType=image/x-3fr;image/x-adobe-dng;image/x-arw;image/x-bay;image/x-canon-cr2;image/x-canon-crw;image/x-cap;image/x-cr2;image/x-crw;image/x-dcr;image/x-dcraw;image/x-dcs;image/x-dng;image/x-drf;image/x-eip;image/x-erf;image/x-fff;image/x-fuji-raf;image/x-iiq;image/x-k25;image/x-kdc;image/x-mef;image/x-minolta-mrw;image/x-mos;image/x-mrw;image/x-nef;image/x-nikon-nef;image/x-nrw;image/x-olympus-orf;image/x-orf;image/x-panasonic-raw;image/x-pef;image/x-pentax-pef;image/x-ptx;image/x-pxn;image/x-r3d;image/x-raf;image/x-raw;image/x-rw2;image/x-rwl;image/x-rwz;image/x-sigma-x3f;image/x-sony-arw;image/x-sony-sr2;image/x-sony-srf;image/x-sr2;image/x-srf;image/x-x3f;